Mis-matched is a word used to describe things that do not fit well or complement each other. The antonyms, or opposites, of mis-matched are words that describe things that do fit well with each other. These antonyms include matched, compatible, harmonious, fitting, suitable, complementary, congruous, uniform, and coherent. These words can be used to describe relationships, clothing, furniture, colors, or any other items that need to work together. When things are matched or compatible, they work in harmony to create a cohesive whole. The use of the right antonym for mis-matched can help convey a sense of balance and order in any situation.